Interstate Pneumatics FL188 Easy Lock Brass Hose Fittings, Connectors, 1/2 Inch Push-Lock Barb x 1/2 Inch Male NPT End Threads: 1/2 inch Barb x 1/2 inch Male NPT End - Machined (Provides seal tight threads) Temperature Range: -65 F to 250 F Maximum Operating Pressure: 250 PSI Conformance: ASME, SAE, NPT Material: Brass - Excellent strength and ductility, corrosion resistance, low magnetic permeability